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use std::borrow::Cow;
use std::time::Duration;
use futures::{
future::{self, Future},
try_ready, Async, Poll,
};
use crate::config::Builder;
use crate::instrumentation::NoInstrumentation;
use crate::pooled_connection::ConnectionFlavour;
use crate::pools::pool_internal::{CheckoutManaged, Managed};
pub mod config;
pub mod instrumentation;
pub use crate::error::{CheckoutError, CheckoutErrorKind};
pub use commands::Commands;
pub use pooled_connection::RedisConnection;
pub(crate) mod connection_factory;
pub(crate) mod executor_flavour;
pub(crate) mod helpers;
mod activation_order;
mod backoff_strategy;
mod commands;
mod error;
mod pooled_connection;
mod pools;
mod redis_rs;
pub trait Poolable: Send + Sized + 'static {
fn connected_to(&self) -> &str;
}
pub struct Checkout(CheckoutManaged<ConnectionFlavour>);
impl Checkout {
pub(crate) fn new<F>(f: F) -> Self
where
F: Future<Item = Managed<ConnectionFlavour>, Error = CheckoutError> + Send + 'static,
{
Checkout(CheckoutManaged::new(f))
}
}
impl Future for Checkout {
type Item = RedisConnection;
type Error = CheckoutError;
fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
let managed = try_ready!(self.0.poll());
Ok(Async::Ready(RedisConnection {
managed,
connection_state_ok: true,
}))
}
}
#[derive(Clone)]
enum RedisPoolFlavour {
Empty,
Shared(pools::SharedPool),
PerNode(pools::PoolPerNode),
}
#[derive(Clone)]
pub struct RedisPool(RedisPoolFlavour);
impl RedisPool {
pub fn builder() -> Builder<NoInstrumentation> {
Builder::default()
}
pub fn no_pool() -> Self {
RedisPool(RedisPoolFlavour::Empty)
}
pub fn check_out(&self) -> Checkout {
match self.0 {
RedisPoolFlavour::Shared(ref pool) => pool.check_out(),
RedisPoolFlavour::PerNode(ref pool) => pool.check_out(),
RedisPoolFlavour::Empty => Checkout(CheckoutManaged::new(future::err(
CheckoutError::new(CheckoutErrorKind::NoPool),
))),
}
}
pub fn check_out_explicit_timeout(&self, timeout: Option<Duration>) -> Checkout {
match self.0 {
RedisPoolFlavour::Shared(ref pool) => pool.check_out_explicit_timeout(timeout),
RedisPoolFlavour::PerNode(ref pool) => pool.check_out_explicit_timeout(timeout),
RedisPoolFlavour::Empty => Checkout(CheckoutManaged::new(future::err(
CheckoutError::new(CheckoutErrorKind::NoPool),
))),
}
}
pub fn stats(&self) -> Vec<self::stats::PoolStats> {
match self.0 {
RedisPoolFlavour::Shared(ref pool) => vec![pool.stats()],
RedisPoolFlavour::PerNode(ref pool) => pool.stats(),
RedisPoolFlavour::Empty => Vec::new(),
}
}
pub fn trigger_stats(&self) {
match self.0 {
RedisPoolFlavour::Shared(ref pool) => pool.trigger_stats(),
RedisPoolFlavour::PerNode(ref pool) => pool.trigger_stats(),
RedisPoolFlavour::Empty => {}
}
}
pub fn ping(&self, timeout: Duration) -> impl Future<Item = Vec<Ping>, Error = ()> + Send {
match self.0 {
RedisPoolFlavour::Shared(ref pool) => Box::new(pool.ping(timeout).map(|p| vec![p]))
as Box<dyn Future<Item = _, Error = ()> + Send>,
RedisPoolFlavour::PerNode(ref pool) => Box::new(pool.ping(timeout)),
RedisPoolFlavour::Empty => Box::new(future::ok(vec![])),
}
}
pub fn connected_to(&self) -> Cow<[String]> {
match self.0 {
RedisPoolFlavour::Shared(ref pool) => Cow::Borrowed(pool.connected_to()),
RedisPoolFlavour::PerNode(ref pool) => Cow::Owned(pool.connected_to()),
RedisPoolFlavour::Empty => Cow::Owned(vec![]),
}
}
}
pub mod stats {
#[derive(Debug, Clone)]
pub struct PoolStats {
pub connections: MinMax,
pub in_flight: MinMax,
pub reservations: MinMax,
pub idle: MinMax,
pub node_count: usize,
pub pool_count: usize,
}
impl Default for PoolStats {
fn default() -> Self {
Self {
connections: MinMax::default(),
in_flight: MinMax::default(),
reservations: MinMax::default(),
idle: MinMax::default(),
node_count: 0,
pool_count: 0,
}
}
}
#[derive(Debug, Clone, Copy)]
pub struct MinMax<T = usize>(pub T, pub T);
impl<T> MinMax<T>
where
T: Copy,
{
pub fn min(&self) -> T {
self.0
}
pub fn max(&self) -> T {
self.1
}
}
impl<T> Default for MinMax<T>
where
T: Default,
{
fn default() -> Self {
Self(T::default(), T::default())
}
}
}
#[derive(Debug)]
pub enum PingState {
Ok,
Failed(Box<dyn std::error::Error + Send>),
}
#[derive(Debug)]
pub struct Ping {
pub latency: Duration,
pub uri: Option<String>,
pub state: PingState,
}
impl Ping {
pub fn is_ok(&self) -> bool {
match self.state {
PingState::Ok => true,
_ => false,
}
}
pub fn is_failed(&self) -> bool {
!self.is_ok()
}
}